slavedrbd
创建磁盘分区
fdisk /dev/sdb
创建一个新的分区，设为主分区，分区号为1，并将信息写入分区表
Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 1
Partition 1 is already defined.  Delete it before re-adding it.
w
kernel重新读取分区表，在不重新启动机器的情况下让系统识别分区
partprobe /dev/sdb1
安装软件drbd
tar zxf drbd-8.3.1.tar.gz
cd drbd-8.3.1
make && make install
加载drbd模块
modprobe drbd
测试模块是否加载成功
lsmod|grep drbd
出现下面提示说明drbd模块加载成功
[root@masterdrbd ~]# lsmod |grep drbd
drbd                  221720  3
配置drbd，按下文所示配置drbd.conf配置文件
[root@masterdrbd ~]# cat /etc/drbd.conf
global {
    usage-count yes;
    }
    common {
        syncer { rate 100M; }
        }
    resource nfs {
        protocol C;
        startup {
            wfc-timeout 0;
            degr-wfc-timeout 120;
            }
        disk {
            on-io-error detach;
            }
        net {
            timeout 60;
            connect-int 10;
            max-buffers 2048;
            max-epoch-size 2048;
            }
        syncer {
            rate 100M;
            }       
        on masterdrbd {
            device /dev/drbd0;
            disk   /dev/sdb1;
            address  192.168.151.42:7788;
            meta-disk internal;
            }
        on slavedrbd  {
            device /dev/drbd0;
            disk /dev/sdb1;
            address 192.168.151.43:7788;
            meta-disk internal;
            }
}
将该文件分别拷贝到两台主机上的/etc下面，两台主机上一样
创建供DRBD记录信息的数据块
# drbdadm create-md nfs(resource名)可能会出现以下错误提示
[root@slavedrbd ~]# drbdadm create-md nfs
md_offset 299992375296
al_offset 299992342528
bm_offset 299983183872

Found ext3 filesystem which uses 292961308 kB
current configuration leaves usable 292952328 kB

Device size would be truncated, which
would corrupt data and result in
'access beyond end of device' errors.
You need to either
   * use external meta data (recommended)
   * shrink that filesystem first
   * zero out the device (destroy the filesystem)
Operation refused.

Command 'drbdmeta 0 v08 /dev/sdb1 internal create-md' terminated with exit code 40
drbdadm create-md nfs: exited with code 40
删除磁盘分区格式
# dd if=/dev/zero  of=/dev/sdb1 bs=1M count=1
启动drbd服务
# service drbd start
Starting DRBD resources: [ ].
查看drbd状态
service drbd status
drbd driver loaded OK; device status:
version: 8.3.1 (api:88/proto:86-89)
GIT-hash: fd40f4a8f9104941537d1afc8521e584a6d3003c build by root@localhost.localdomain, 2013-03-18 16:36:27
m:res  cs         ro                 ds                 p  mounted  fstype
0:nfs  Connected  Secondary/Primary  UpToDate/UpToDate  C
初始化一个为主机(在masterdrbd上执行)
drbdsetup /dev/drbd0 primary -o
等待同步完成
验证drbd
格式化块设备(只需要格式化主机上的drbd0)
# mkfs.ext3 /dev/drbd0
挂载
# mount /dev/drbd0 /drbd
安装配置heartbeat
分别在两台主机上安装配置heartbeat，在此不详述。
安装配置nfs
分别在两台主机上安装配置nfs并将/drbd目录共享出去，供其他主机挂载。
nfs服务监控
[root@masterdrbd ~]# cat /etc/init.d/monitornfsd
#!/bin/bash
# write by Andy Wang
#
while true
do
    ps -ef |grep nfsd|grep -v grep|grep -v monitornfsd >/tmp/tmpfile
    [ ! -s /tmp/tmpfile ] && /etc/init.d/heartbeat stop >/dev/null 2>&1
    sleep 5
done
监控脚本启动，关闭
[root@masterdrbd ~]# cat /etc/init.d/chknfsd
#!/bin/bash
# write by Andy Wang
# 
SPATH=/etc/init.d
PID=`ps -ef|grep monitornfsd|grep -v grep|awk '{print $2}'`
HOSTNAM=`uname -n`
if [ -f /etc/init.d/functions ];then
    . /etc/init.d/functions
elif [ -f /etc/rc.d/init.d/functions ];then
    . /etc/rc.d/init.d/functions
else
    exit 0
fi

start ()
{
if [ -n "$PID" ];then
        echo "monitornfs is running..."
    else
        cd $SPATH
        sh monitornfsd &
fi
}

stop ()
{
if [ -z "$PID" ];then
        echo "monitornfsd is stopped"
    else
        kill -9 $PID >/dev/null 2>&1
fi
}

status ()
{
if [ -n "$PID" ];then
        echo "monitornfsd is ok pid is "$PID" running on $HOSTNAME"
    else
        echo "monitornfsd is stopped on $HOSTNAME"
fi
}

case $1 in
        start)
            start
            ;;
        stop)
            stop
            ;;
        status)
            status
            ;;
        *)
            echo "Usage:$0{start|stop|status}"
        exit 1
esac